We need a new "Language" option on "Options>Editor>OnSave", to control "*.mf" files.

Plain text does not work, so as a workaround, we have to set "All Languages" to "none" (for trailing whitespaces) and all other languages to e.g. all lines
This is not so productive.
Please give a manifest language option as well in a new NB version.

In my opinion "Remove Trailing Spaces" should be a configurable property for specified file types. For example it is desired to trim spaces on source files *.java but it is not on manifest files, because of the blank spaces that are required for "Class-Path:" e.g consider the following manifest.mf, every line in Class-Path section must end with a training space. Since Netbeans trims these spaces I have to edit my manifest files with notepad!

Manifest-Version: 1.0
Main-Class: test.MainDesktop
Class-Path: 
 lib\. 
 lib\hibernate\antlr-2.7.6.jar 
 lib\hibernate\c3p0-0.9.1.jar 
 lib\hibernate\cglib-2.2.jar 
 lib\hibernate\commons-collections-3.1.jar 
 lib\hibernate\commons-logging-1.1.1.jar 
 lib\hibernate\dom4j-1.6.1.jar 
 lib\hibernate\ehcache-1.2.3.jar 
 lib\hibernate\hibernate3.jar 
 lib\hibernate\javassist-3.9.0.GA.jar 
 lib\hibernate\jta-1.1.jar 
 lib\hibernate\log4j-1.2.15.jar 
 lib\hibernate\slf4j-api-1.5.8.jar 
 lib\hibernate\slf4j-log4j12-1.5.8.jar 
 lib\jasperreports\commons-beanutils-1.7.jar 
 lib\jasperreports\commons-digester-1.7.jar 
 lib\jasperreports\commons-javaflow-20060411.jar 
 lib\jasperreports\itext-1.3.1.jar 
 lib\jasperreports\jasperreports-3.0.0-modified.jar 
 lib\jasperreports\jdt-compiler-3.1.1.jar 
 lib\jasperreports\poi-3.0.1-final-20070705.jar